21120211221234 has 32 divisors (see below), whose sum is σ = 42253639433280. Its totient is φ = 7037867827200.

The previous prime is 21120211221233. The next prime is 21120211221283. The reversal of 21120211221234 is 43212211202112.

It is not an unprimeable number, because it can be changed into a prime (21120211221233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659805022 + ... + 659837030.

It is an arithmetic number, because the mean of its divisors is an integer number (1320426232290).

Almost surely, 2^{21120211221234} is an apocalyptic number.

21120211221234 is an abundant number, since it is smaller than the sum of its proper divisors (21133428212046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120211221234 is a wasteful number, since it uses less digits than its factorization.

21120211221234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62986.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21120211221234 its reverse (43212211202112), we get a palindrome (64332422423346).

The spelling of 21120211221234 in words is "twenty-one trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty-one thousand, two hundred thirty-four".